fix used documentation typo

alib2algo/src/automaton/convert/ToGrammarRightRG.cpp

@@ -22,7 +22,7 @@ auto ToGrammarRightRGDFA = registration::AbstractRegister < ToGrammarRightRG, gr
 "Performs the conversion of the finite automaton to right regular grammar.\n\
 \n\
 @param automaton a finite automaton to convert\n\
-ěreturn right regular grammar equivalent to the source @p automaton." );
+@return right regular grammar equivalent to the source @p automaton." );
 } /* namespace convert */